I tried via app first. Uninstall the old version and install the newest worked.

I am connected with the Slate Plus. Here 2,4 GHz, but I also tried -5 for 5 GHz.

What does “detect current network” mean? There are only two networks. WiFi and LTE. It would be nice if I could choose here, of the app needs a hint where to search … It searched and searched. No progress.